/*
 * ==========================================================================================
 * =                   JAHIA'S DUAL LICENSING - IMPORTANT INFORMATION                       =
 * ==========================================================================================
 *
 *                                 http://www.jahia.com
 *
 *     Copyright (C) 2002-2020 Jahia Solutions Group SA. All rights reserved.
 *
 *     THIS FILE IS AVAILABLE UNDER TWO DIFFERENT LICENSES:
 *     1/GPL OR 2/JSEL
 *
 *     1/ GPL
 *     ==================================================================================
 *
 *     IF YOU DECIDE TO CHOOSE THE GPL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 *
 *     2/ JSEL - Commercial and Supported Versions of the program
 *     ===================================================================================
 *
 *     IF YOU DECIDE TO CHOOSE THE JSEL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
 *
 *     Alternatively, commercial and supported versions of the program - also known as
 *     Enterprise Distributions - must be used in accordance with the terms and conditions
 *     contained in a separate written agreement between you and Jahia Solutions Group SA.
 *
 *     If you are unsure which license is appropriate for your use,
 *     please contact the sales department at sales@jahia.com.
 */
package org.jahia.services.search;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.apache.commons.lang.StringUtils;

public class SearchURLService {

    private static volatile SearchURLService instance;

    private SearchURLService() {
    }

    public static SearchURLService getInstance() {
        if (instance == null) {
            synchronized (SearchURLService.class) {
                if (instance == null) {
                    instance = new SearchURLService();
                }
            }
        }
        return instance;
    }

    public void addURLQueryParameter(AbstractHit<?> searchHit, String parameterName,
            String parameterValue) {
        searchHit.setQueryParameter(appendParams(searchHit.getQueryParameter(), parameterName + "=" + encode(parameterValue)));
        return;
    }

    public void updateHitLinkTemplateType (AbstractHit<?> searchHit, String templateType) {
        searchHit.setLinkTemplateType(templateType);
    }

    private String encode(String parameterValue) {
        String value;
        try {
            value = URLEncoder.encode(parameterValue, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException(e);
        }
        return value;
    }

    protected String appendParams(String queryParam, String newParams) {
        if (!StringUtils.isEmpty(newParams)) {
            if (queryParam == null){
                queryParam = "";
            }
            if (queryParam.indexOf("?") == -1) {
                if (newParams.startsWith("&")) {
                    newParams = "?" + newParams.substring(1, newParams.length());
                } else if (!newParams.startsWith("?") && !newParams.startsWith("/")) {
                    newParams = "?" + newParams;
                }
            } else if (!newParams.startsWith("&") && !newParams.startsWith("/")) {
                newParams = "&" + newParams;
            }
            queryParam += newParams;
        }
        return queryParam;
    }
}
